Malicious PDF — malware analysis report

Static analysis result for SHA-256 de04968827c957ee…

MALICIOUS

PDF

76.1 KB Created: 2021-03-19 17:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ec5e26b60a583f3699176696b8835b1d SHA-1: 2b0c58d0a262a93515b907436804f63d427fd25b SHA-256: de04968827c957ee21d040431080d13a14e4f1e52df9be35e1a4eefd42e74baa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/strik?utm_term=how+to+clean+carpet+with+pine+sol PDF link annotation
    • http://gasolotiravizid.sportsontheweb.net/baloch_history_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/hgeCm4Q/san_manuel_slot_technician.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/xarenageliziba.pdfIn PDF document text
    • https://nudabubi.weebly.com/uploads/1/3/4/3/134323665/3450469.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/ihbMJs2/guardian_tales_guide_world_3.pdfIn PDF document text
    • https://pinipinemijik.weebly.com/uploads/1/3/0/8/130814728/vosudetajisave_sedoraresobun_zedab_wenug.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/tonubuja.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/GDIgeic/70783047163.pdfIn PDF document text
    • https://vezulapas.weebly.com/uploads/1/3/0/9/130969209/527899.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/53d868e33e20459.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/23531773485.pdfIn PDF document text
    • https://jowatoziji.weebly.com/uploads/1/3/4/8/134893097/zadugipo.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/87255821421.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/62d732.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/zufewofinuzopef_gixasa_kolepe.pdfIn PDF document text
    • https://lizodeva.weebly.com/uploads/1/3/5/3/135342900/gitujobagizugukegugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/waduzirader/amsterdam_airport_map_terminal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1263ff32-6281-4252-b301-bb56a92a80fe/fikituduk.pdfIn PDF document text
    • http://tonavisuma.onlinewebshop.net/pre_service_teacher_education_concept_nature_objectives_and_scope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ae053b-81c1-48de-83d6-cb5ce5f82f51/48457203408.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/apollo_munich_medical_claim_form.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 5076 bytes
SHA-256: e752becc9718ac50ba7ccce28379a2cbb0ed4462f1378be475b637f6471ead2e
font_01_sfnt_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 11292 bytes
SHA-256: 4136574fb92760db22e9a72f8723681e4c7d51821ddd77f7e747803a15f3108f

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